Slic3r - 1.0.0

(I would like to thank, among others, @stepanb and Microsoft Czech for their support.)

built-in automatic STL repair
OpenGL 3D preview of the repaired file (thanks to iXce for the initial work); also supports multi-material files
ability to override individual config options for each object in the same print job
new support material rewritten from scratch
new Ooze Prevention feature for multiple extruders (park extruders outside skirt and drop temperature by a specified delta)
options to avoid starting loops on convex vertices and/or overhangs
volume calculation
ability to customize how materials are mapped to extruders
new First Layer Acceleration option
new option to use firmware-controlled retraction (G10/G11)
new option to use a distinct extruder for support material interface

Slic3r is now much faster because many mature parts of code were rewritten in C++ for faster processing and less memory usage (Slic3r is now 40% C++)
most of memory is now truly shared between threads, reducing the total footprint
improved infill patterns and bridge detection
the automated test suite was largely enriched
don’t combine retract and travel anymore when using G0 (Mach3 compatibility)
better Makerbot (Makerware/Sailfish) compatibility
Windows binaries are now built with Expat for faster AMF parsing

new [layer_num] placeholder in layer-change G-code
custom G-code can be supplied via command line too
some options were renamed or rearranged for clarity
new –info command line option to get information about the file
add .ngc to supported G-code suffixes
the wizard now saves initial profiles automatically
automatically copy Simple Mode settings into a ‘Simple Mode’ preset in Expert Mode

layer height ranges are scaled automatically when object is scaled in plater
avoid G92 E0 for sailfish output
the “Infill every n layers” option was renamed to “Combine infill every n layers” to clarify its purpose

crash when using the Infill only where needed option
bridge speed was not used for the first solid layer above sparse infill
a few models were sliced incorrectly and had solid bridges in random places
exporting binary STL files produced corrupt results on Windows
holes were not sorted using a nearest-neighbor search, resulting in inefficient paths
crash when user entered Unicode characters in notes
wrong wiping moves for hole perimeters were calculated for the second copy of an object

facets were completely reversed because of an overflow triggered by STL files with very large coordinates
rectilinear infill was exceeding perimeters when using very low layer height
random lack of infill caused by recent changes aimed at reducing memory usage
incorrect number of raft layers was geenrated when too few were requested
fatal error in the rare case that a bridge has no valid anchor points
fatal error when concentric infill generated too tight loops
spiral vase generated some wrong layers
when processing with fill_density = 0, top/bottom solid shells were missing regions thinner than three times the extrusion width
the M73 command used with makerware/sailfish G-code flavor exceeded 100% under certain circumstances

the Windows 64-bit package was missing an OpenGL library
the Linux packages were missing XML::SAX thus weren’t able to load AMF files
a regression caused all perimeter holes to be completed doing contours instead of finishing one island at time
retraction restarts ignored the extrusion_axis setting
objects could not be repositioned in plater after hitting the Split button
Z moves were skipped after the first object was complete when using Sequential Printing
objects were incorrectly placed in exported STL files
fixed a fatal error related to thin walls
fixed random crashes (mostly visible on 32-bit Windows)
the Avoid Crossing Perimeters implementation was rewritten in order to fix some regressions and make it faster
fan wasn’t enabled when vibration limit or another internal post-processor was enabled
raft wasn’t generated for the entire object footprint
thin walls came out as zig-zag paths instead of straight lines
narrow gaps were not infilled under certain circumstances

several threading issues were fixed
some situations causing incomplete infill were fixed
fixed regression causing wrong direction for inwards move in holes, thus little blobs
fix crash on Windows when username had non-ASCII characters
some spiral vase prints had little gaps in the loops
Z-offset was not applied to spiral vase prints
lift was not working correctly with multiple extruders and multiple skirt layers
fix speed math for wipe, which was causing too fast retraction
other minor fixes

Release notes for 1.0.0 (2014-03-26)